Compression Test Results After N/T to Turbo Conversion

[aspekt9]

So I turbo'd my N/T around 8,000 miles ago (car now has 79,000 miles on it). I wanted to see how it was holding up so I ran a compression test and here's the results from left to right:

190 190 165 175

I added a cap of oil to the #2 cylinder and it brought compression up to around 185. N/T compression is supposed to be 192 and the service limit is 145. Should I be concerned about these numbers? Before the swap everything was 210 compression across all 4 cylinders. Is there anyway without a leakdown test to determine if the dropped compression is because of rings or valve stem seals? I also notice a decent amount of blow by which I'm not sure is related to rings or a bad pcv valve. The car only has 79,000 miles on it though.

 

[JEFFREYCASTGSX]

Its nothing to worry about,though it does seem like the oil rings on number 2 are getting worn, but still nothing to worry about.

 

[aspekt9]

So it's most likely the rings? Valve stem seals wouldn't cause a loss of compression like that, would they? About how long would I still be able to drive the car for?

 

[Spdfreak]

that seems like a pretty drastic drop in compression from 210 to 165 in only 8000 miles and 71,000 on non turbo setup compression was good at that rate youl be rebuilding soon cause the service limit of 145 is on the non turbo how much boost are you running the blow is a good indication of worn rings

 

[bastarddsm]

Dude, your not bad still. How have you been running it? mods? boost? fuel? Might have a ringland busted.